31/2002 Sb.
DECREE
The Ministry of industry and trade
of 11 December 1997. January 2002,
laying down the requirements on alcoholometers and alcohol hydrometers, known
the EEC
Change: 260/2003 Coll.
The Ministry of industry and trade of the Czech Republic, determined in accordance with section 27 of the
Act No. 506/1990 Coll., on weights and measures, as amended by Act No. 121/2000 Coll.,
(hereinafter referred to as the "Act") to implement section 6 (1). 2 of the Act:
§ 1
This Decree lays down the requirements on alcoholometers and alcohol hydrometers, which
are used to determine the alcoholic strength of mixtures of water and ethanol and
are referred to by the EEC, (hereinafter referred to as "alcoholometers and alcohol hydrometers").
§ 2
(1) alcoholometers and alcohol hydrometers can be instead of official designation
markers laid down special legal regulation ^ 1) marked by an
EEC pattern approval and EEC initial verification, whose graphic design
provides for a separate legal regulation, ^ 2) only if they meet the requirements
set out in the annex and which has been verified by the procedures laid down
special legislation. ^ 2)
(2) the method of determining the volume of a volumetric concentration of ethyl alcohol and
How to calculate the amount of alcohol lays down specific legislation. ^ 3)
§ 3
This Decree shall take effect on the date of publication of the sectoral annex for
the measuring instrument to the Protocol to the Europe Agreement establishing an association between the
The Czech Republic on the one hand, and the European communities and their
Member States, of the other part, on conformity assessment and acceptance of
industrial products in the collection of international treaties, or on the date of entry
the Treaty of accession of the Czech Republic to the European Union entered into force,
If the day earlier.
Minister:
doc. Ing. Gregr, r.
XIII.
1. definition of the measuring instruments
1.1 Alcoholometers are glass gauges that indicate the mass fraction of
alcohol or alcoholic strength by volume, in a mixture of water and ethanol.
These gauges are described as mass alcoholometers or volume
alcoholometers, depending on what is measured. On alcohol hydrometers are glass
a measuring instrument designed to measure the density of the mixture of water and ethanol.
1.2 Gauge defined in this Decree are graduated in
reference temperature of 20 ° C, in accordance with the values calculated according to the
special legal regulation ^ 3).
1.3 this meters are graduated for reading in the plane of the free
the horizontal surface of the liquid.
2. Description of gauges
2.1 alcoholometers and alcohol hydrometers are glass measuring instruments which are
consists of a cylindrical body, the bottom of which is cone-shaped, or
hemispherical so that it does not entrap air bubbles and hollow cylindrical
the stalk of fused to the upper part of the body, its upper end is sealed.
2.2 the entire external surface of every instrument must be symmetrical about its main
axis. Cross-section must not exhibit any sudden change.
2.3 the lower part of the body must contain the loading material, the purpose of which
is to offset the weight of the gauge.
2.4 the Shank must be graduated on a cylindrical support well fixed
to the inside of the stem.
3. Design principles
3.1 the Glass used for the manufacture of measuring instruments must be transparent and without
any defects which could negatively affect the reading of the
the scale. The glass shall have a coefficient of cubic expansion (25 +/-2).
10E-6 CE-1.
3.2 the loading material shall be fixed in the lower part of the gauge. Then,
What is the modified gauge leaves for one hour in a horizontal position
at 80 ° C and then cooled in this position, when immersion is a must
hover so that its vertical axis deviating by 1 degree and 30
minutes.
4. The scale
4.1 No gauge must not have more than one scale of the type referred to in
section 4.5 or 4.6.
4.2. The scale and the inscriptions shall be marked on a support having a smooth and
the matte finish. This support must be well fixed to a place in the stem and
reference tags should be made so that each scale and offset
the support given to the stem was obvious. Support, the scale and the inscriptions
they may not show any traces of deformation, discoloration or burned in
as a result of exposure to temperatures of 70 degrees C for 24 hours.
4.3 the scale marks shall be:-situated in planes perpendicular to the axis
gauge-black and marked clearly and indelibly; out of range
nominal scales scale-marks may have a different color, fine and
aligned and about the same thickness not greater than 0.2 mm.
4.4 short Length scale-marks shall be at least one-fifth, length
medium scale-marks at least one third of the length of the long and brands
the scale of at least half the circumference of the stem.
4.5. Alcoholometers shall have nominal scales graduated by weight
percentage or percentage of alcohol by volume. Their range may not
exceed 10% of the volume or weight of alcohol. The value of the scale interval
shall be 0.1%. Each scale shall include 5 to 10 additional
lines for the upper and lower limits of the nominal range.
4.6 on the ethyl alcohol shall have nominal scales graduated by kg/m3.
Must cover a range not exceeding 20 kg/m3. The value of the scale intervals
must be 0.2 kg/m3. Each scale shall include 5 to 10 additional
the tick marks at the upper and lower limits of the nominal range. However, the scale must not be
shall not exceed 1000 kg/m3.
5. Graduation and numbering
5.1 for alcoholometers, every tenth brand on a scale, starting from the one
the end of the nominal scale, shall be a long. Medium length
It must be between each successive pair of long marks and four
short tags between each long brand and the closest medium-long
mark. Long tag must be numbered.
5.2 on alcohol hydrometers, every fifth mark must be long, starting from the
one end of the nominal scale. Between two consecutive
the following long marks must be four short of the marker.
Must be numbered only fifth and tenth brand.
5.3 Marks indicating the limits of the nominal scale shall be described in full
figures. On alcohol hydrometers can be other graduations
marked with short figures eg. only the numbers after the decimal point
with a comma.
6. Classification and principal dimensions of the measuring instruments
6.1 the meter must be in one of the following classes of accuracy:
-Class i: the length of the scale Division must be at least 1.5 mm.
Measuring instruments in this class shall not have a thermometer.
-Class II: the length of the scale spacing shall be 1.05 mm at least.
Measuring instruments in this class may incorporate a thermometer.
-Class III: the length of the scale Division must be at least 0.85 mm.
Measuring instruments in this class may incorporate a thermometer.
6.2. The outer diameter of the body of any of the gauge must be between 20 to 40 mm.
External diameter of the stem shall be at least 3 mm for class I and II, and at least
2.5 mm for class III. The length of the stems must extend at least 15 mm above the
the highest scale mark. Cross section of the stem must be a constant, at least in
5 mm below the lowest scale mark.
7. The inscriptions
inside the gauge must be legibly and indelibly marked
the following inscriptions.
-class I, II or III,
-kg/m3 or volumetric percentage or percentage, by weight,
-20 ° C,
-ethanol,
-the name or identifying mark of the manufacturer,
-the identification number of the meter,
-approval mark.
7.2 Weight measuring instrument, expressed to the nearest milligram, may
be marked on the body of the instrument.
8. the maximum permissible errors and verification
8.1 the maximum permissible error for alcoholometers and alcohol hydrometers shall be:
-Class I +/-half scale interval for each reading measured on the scale,
-Class II and III +/-one scale interval for each reading measured on the scale
8.2. Verification shall be carried out in at least three points of the range
nominal scales.
9. Thermometers used in determining alcoholic strength
9.1. Thermometers incorporated in the gauge used in determining the content of
alcohol.
If a measuring instrument used to determine alcoholic strength belongs to class
II or III, the thermometer gratuated in glass casing in it
can be built-in.
9.1.1 the thermometer must have the value of the interval 0.1 ° C or ° C 0.2 or 0.5
C and need not have any scale mark at 0 ° C.
9.1.2 the minimum mean scale spacing shall be: 0.8 mm in the case of
thermometers graduated (0.1 and 0.2) C, 1.0 mm in the case of
thermometers graduated to 0.5 ° C.
9.1.3 the thickness of the lines shall not be more than one fifth the length of the
scale interval.
9.1.4 the maximum permissible error shall be: +/-0.10 St. (C), if the
the thermometer is graduated to 0.1 ° C; +/-0.20 C,
If the thermometer is graduated to 0.2 or 0.5 ° C st.
(C).
9.1.5 during the approval process of the built in error shall be
thermometer fixed at least three points of the scale.
9.2. Thermometers not incorporated in the gauge used in determining the content of
alcohol.
9.2.1. If the measuring instrument used to determine alcoholic strength belongs to
in class I, the thermometer employed in conjunction with it shall be:-either of the metallic
resistance type, enabling the temperature of the mixture of water and alcohol with a maximum permissible
error +/-0.10 ° C,-or of the mercury-expansion type with glass casing,
with graduated to 0.1 ° C or after 0.5 degrees C the mercury
thermometers shall have a scale mark at 0 ° C, the minimum scale interval
the scale must be 0.8 mm and the width of the scale marks must not be greater than the
one fifth of the scale spacing.
The maximum permissible error, plus or minus one graduation must be
the scale.
9.2.2 If a measuring instrument used to determine alcoholic strength belongs to
to class II or III, the thermometer employed in conjunction with it shall be
the thermometer mercury-expansion type with a glass casing.
9.2.2.1 thermometer shall be graduated to value 0.1 or 0.2 ° C st.
(C) or 0.5 degrees C this thermometer must have a tag of 0 degrees C.
9.2.2.2. The minimum scale spacing shall be:-0.8 mm in the case of
thermometers graduated to 0.1 or 0.2 ° C ° C,-1.0 mm
in the case of thermometers graduated to 0.5 ° C.
9.2.2.3 the thickness of the lines shall not be more than one fifth the length of the
of the interval.
9.2.2.4 maximum permissible error shall be: +/-0.10 St. (C), if the
the thermometer is graduated to 0.1 ° C, +/-0.20 C,
If the thermometer is graduated to 0.2 or 0.5 ° C st.
(C).
10.
On the back of alcoholometers and alcohol hydrometers are leaving in their upper
one third of the space for the initial EEC verification mark. According to a special
Law ^ 2) must make the initial EEC verification as a result
Special marking requirements for glass instruments, consist of a series of
characters that have the following meanings:
-the letter "e"
-the last two digits of the year of the initial EEC verification
-the identification letter or letters of the country in which the initial EEC
verification is carried out,
-the identification number of the authentication authority
If the marking done by sandblasting, the letters and figures must be
used so as not to disturb their readability.
1) Decree No. 262/2000 Coll., which ensures consistency and accuracy
measuring instruments and measurements.
2) Decree No. 332/2000 Coll., laying down some of the procedures in the
type-approval and verification of measuring instruments, called marker set
EEC.
3) section 3 of Decree No. 142/1997 Coll., on technical requirements for the manufacture,
storage and processing of ethyl alcohol, as amended by Decree No 82/2000 Sb.